For Zen 4 a good part of the power reduction is that the i/o die went from the Global Foundries 12nm process to TSMC's 6nm process. That probably accounts at l

For Zen 4 a good part of the power reduction is that the i/o die went from the Global Foundries 12nm process to TSMC's 6nm process. That probably accounts at least partly for the large drop in power for the same performance, making it unlikely that Apple will see the same drop.